Transparent Display Pixel Segmentation for Transmittance
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Solution Overview
Problem
Current transparent display devices face challenges in achieving high transmittance while maintaining image display and object recognition, as the emission areas tend to block external light, reducing the visibility of objects behind the display.
Innovation Solution
A method of manufacturing transparent display devices involves forming a circuit element layer, a first electrode, a pixel define layer, and organic layers on a base substrate, with specific openings to create emission and transmission areas, where the preliminary organic layer is heated and separated from the circuit element layer to form an organic layer and electrode, allowing for increased transmittance without compromising image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the emission area is increased to improve image display, then the image display quality is improved, but the transmittance of external light is reduced
Solution Approach 1:
The pixel area is divided into two distinct functional zones: an emission area for displaying images and a transmission area for allowing external light to pass through. This segmentation resolves the contradiction by spatially separating the functions of image display and light transmission, enabling both to coexist without interfering with each other.
Solution Approach 2:
Different regions of the pixel are assigned different optical properties: the emission area is optimized for light emission and image display, while the transmission area is optimized for high transmittance. This local differentiation of quality allows each region to perform its specific function effectively without compromising the other.
2Quantity of substance
If the transmission area is increased to improve transmittance, then the transmittance of external light is improved, but the image display area is reduced
Solution Approach 1:
The pixel area is divided into two distinct functional zones: an emission area for displaying images and a transmission area for allowing external light to pass through. This segmentation resolves the contradiction by spatially separating the functions of image display and light transmission, enabling both to coexist without interfering with each other.
3Quantity of substance
If the preliminary organic layer is heated to separate it from the circuit element layer, then the transmittance is improved, but the manufacturing complexity increases
Solution Approach 1:
The manufacturing process utilizes temperature as a controllable parameter to induce phase change in the preliminary organic layer. By heating to a specific temperature range, the organic layer transitions from a solid state to a separated state, enabling clean removal from the circuit element layer. This parameter-based approach simplifies the separation process compared to mechanical or chemical methods.
Solution Approach 2:
The preliminary organic layer undergoes a phase transition when heated, changing from a solid adhered state to a separable state. This phase change enables the organic layer to be cleanly removed from the circuit element layer without damaging either component, achieving the desired separation through a fundamental physical transformation rather than complex mechanical or chemical processes.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances transmittance in the transmission areas while maintaining image display and object recognition, allowing users to see both the displayed image and objects behind the device.
Implementation Method 1
heating up a portion of the preliminary organic layer disposed on the transmission area to separate the portion of the preliminary organic layer from the circuit element layer
Data Source
AI summary
A transparent display device including a base substrate, a plurality of pixels disposed on the base substrate, each pixel having an emission area and a transmission area transparent to external light, a circuit element layer disposed on the base substrate, a first electrode disposed on the circuit element layer and corresponding to the emission area, a pixel define layer disposed on the circuit element layer, the pixel define layer including a first sidewall defining the emission area and a second sidewall defining the transmission area, an emission layer disposed on the first electrode and corresponding to the emission area, and a second electrode disposed on the emission layer and including an opening that corresponds to the transmission area, in which the first sidewall is inclined at a first angle, and the second sidewall is inclined at a second angle greater than the first angle.